devel/ruby-backports: update to 3.17.0

Update ruby-backports to 3.17.0.


## [3.17.0](marcandre/backports@v3.16.1...v3.16.2) - 2020-03-06

### Added

* Ruby 2.6 backports

  * Range
    * `cover?` (with `Range` argument)

### Changed

Requiring features for a particular version of Ruby or `latest` is un-deprecated but
instead simply warned in verbose mode.

## [3.16.1](marcandre/backports@v3.16.0...v3.16.1) - 2020-02-16

### Deprecated

Officially deprecate requiring features for a particular version of Ruby, `latest`, `std_lib` or `rails` backports

### Fixed

`matrix` library when loaded in 2.7.0 [#141]

## [3.16.0](marcandre/backports@v3.15.0...v3.16.0) - 2020-02-06

### Added

* Ruby 2.7 backports

  * Array
    * `intersection`

  * Comparable
    * `clamp` (with range)

  * Complex
    * `<=>`

  * Enumerable
    * `filter_map`
    * `tally`

  * Enumerator
    * `produce` (class method)

  * Time
    * `floor`, `ceil`

devel/ruby-backports/Makefile

@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.13 2019/10/23 16:22:22 taca Exp $
+# $NetBSD: Makefile,v 1.14 2020/03/08 13:28:18 taca Exp $
 
-DISTNAME=	backports-3.15.0
+DISTNAME=	backports-3.17.0
 CATEGORIES=	devel
 
 MAINTAINER=	[email protected]